Light - Study Mode

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[#6] Direct viewing of Sun during total solar eclipse causes irreversible damage to eyes. The retinal burn is caused by which one of the following components of the Sun rays?

(A) Heat

(B) Rainbow light

(C) Ultra-violet light

(D) Infra-red light

Correct Answer

(C) Ultra-violet light

[#7] In which of the following cases can Total Internal Reflection (when angle of incidence is greater than the critical angle) take place? When light travels from

(A) Glass of Diamond

(B) Air to Water

(C) Air to Glass

(D) Diamond to Air

Correct Answer

(D) Diamond to Air

[#8] An object is placed in front of a convex mirror at a point between the infinity and the pole of the mirror. The image formed will be.

(A) real and big

(B) real and small

(C) virtual and small

(D) virtual and large

Correct Answer

(C) virtual and small

[#9] Which one of the following colours is seen in the middle of a Rainbow?

(A) Blue

(B) Green

(C) Red

(D) Yellow

Correct Answer

(B) Green

[#10] A ray of light passing through a lens . . . . . . . . will pass without any deviation.

(A) main focus

(B) center of curvature

(C) main axis

(D) optical center

Correct Answer

(D) optical center